Nikki Reed reveals that she was surprised to learn that her best friend Kat Dennings also shares a deep love for all-brother pop group Hanson.

The actresses are very close, but Nikki only recently realised that they share a deep affinity for all things Hanson related.

Nikki and Kat are so into the all-brother pop group, they even starred in the musicians’ most recent music video for single Get the Girl Back.

"Let me tell you a story about that," Nikki told MTV.

"Kat Dennings—who happens to be one of my closest girlfriends—Kat and I are massive Hanson fans, and we did not discover this about one another, even though we are super-close. We didn't know we were Hanson fans until we both signed onto the video. It was a weird, secret obsession that we both had and kept to ourselves.

"I wrote [Hanson] fan mail. That's how my relationship with them started. I mean, I love them. I wrote them fanmail in the hopes that they'd write me back, and Kat did the same thing. That's how these relationships blossomed. And they called both of us... and then we both showed up to do this video. It could not be any funnier. Just because I see Kat every week. How did I not know this about her?"

Apparently their shared obsession with Hanson simply didn’t turn up in conversation.

Nikki confesses that her love for the boy band is somewhat of a skeleton in the closet.

"It was just something we hadn't talked about," she said.

"That's why it's so random. I don't think we were ashamed of our Hanson love."

It seems that nearly everyone Nikki knows and loves is a Hanson fan.

Her musician husband Paul McDonald shares his wife’s sentiments.

"Paul actually has a little cameo in the video too," she smiled.

"Regardless of whether or not you like MMBop, we're talking about three brothers who could not be more—they're such polished musicians. They get to practice all day, every day with each other from the time they were directly out of the womb. When you're around them, you have to be inspired musically. They're so talented."